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"for loop" array

I was wondering if someone could help me with this. I am collecting numbers from each input with the class name 'totalrow'. That part is fine, but now I want to take all the results from each 'totalrow' and combine it into one final result. The 'totalrow's are generated dynamically through PHP.

If I put alert(total[i]); after 'total[i] = + document.getElem...' it alerts each of the correct values.

In a nutshell: I want to get all values from the 'totalrows' classname and add them together to alert the final total.